1219973109 has 16 divisors (see below), whose sum is σ = 1714252800. Its totient is φ = 769604976.

The previous prime is 1219973087. The next prime is 1219973113. The reversal of 1219973109 is 9013799121.

It is not a de Polignac number, because 1219973109 - 2⁷ = 1219972981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219973119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38212 + ... + 62450.

It is an arithmetic number, because the mean of its divisors is an integer number (107140800).

Almost surely, 2^1219973109 is an apocalyptic number.

1219973109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1219973109 is a deficient number, since it is larger than the sum of its proper divisors (494279691).

1219973109 is a wasteful number, since it uses less digits than its factorization.

1219973109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25144.

The product of its (nonzero) digits is 30618, while the sum is 42.

The square root of 1219973109 is about 34928.1134474795. The cubic root of 1219973109 is about 1068.5218793172.

The spelling of 1219973109 in words is "one billion, two hundred nineteen million, nine hundred seventy-three thousand, one hundred nine".